Lenovo on Sept. 28 recalled 526,000 battery packs used along with its ThinkPad T Series, R Series and X Series notebooks, similar to whats shown here, citing a risk of overheating and fire.

Photo: CPSC

Despite the fact that more than 7.5 million notebook battery packs containing Sony-made lithium-ion cells have been recalled, lithium-ion technology is expected to stick around for notebooks, experts say. Still, there are a few alternatives.